/Engine/Source/Editor/UnrealEd/Public/WorkflowOrientedApp/WorkflowTabManager.h
Replaces the open payload in the specified tab with a new one; recreating the contents.
void ReplacePayloadInTab ( [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [SDockTab](API\Runtime\Slate\Widgets\Docking\SDockTab) > TargetTab, [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FTabPayload](API\Editor\UnrealEd\WorkflowOrientedApp\FTabPayload) > NewPayload )